<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>6.4</title>
	<script src="js/vue.js"></script>
	</head>
	<body>
		<div id="app">
			<counter>
			</counter>
		</div>
	</body>
	<script type="text/x-template" id="x-btn">
		<button @click="num++">{{num}}次</button>
	</script>
	<script>
		Vue.component('counter',{
			data:function(){
				return{
					num:0
				}
			},
			template: '#x-btn'
		})
		
		let vm = new Vue({
			el:'#app'
		})
	</script>
</html>